RELIABILITY STUDY OF THE SCANIA TRUCK

Abstract

In conclusion, the study conducted at the Scania truck dealership in Domeikava, Kaunas district defined the average repair costs required for a 2018 Scania P450 truck, depending on its mileage. Companies and private individuals increasingly choose a truck that offers the best balance between price and quality. By analyzing the vehicle’s reliability and the required repair costs, consumers can make informed decisions when selecting a vehicle that meets their needs and preferences. The article presents a case study of a specific Scania P450 truck, focusing primarily on its maintenance costs and reliability changes depending on mileage. The study evaluated changes in the number of dealership visits, variations in comparative expenses, and the overall average engine-related costs based on mileage. Corresponding graphs were created based on these aspects, illustrating how repair costs and reliability evolve over time. The research utilized data from Scania dealerships across European countries, which provided a complete service history of the vehicle throughout its entire operational period. Using this method, data was collected from 26 trucks of the same make and model. The recorded parameters were divided into 100,000 km intervals to clearly observe variations in comparative costs and reliability. In the high-mileage range (>600,000 km), expenses increase sharply, and the quadratic regression term becomes more pronounced. This occurs due to greater component wear and more expensive, frequent repairs, such as major engine overhauls, oil pressure issues, turbocharger failures, engine errors, exhaust system malfunctions, and other costly and time-consuming repairs. The study highlights that as truck mileage increases, visits to service centers become more frequent, indicating a decline in vehicle reliability and the residual value of individual components. As a result, the dependence of comparative costs on mileage continues to rise.